Who they are
Tello is an independent, privately owned US carrier, operated by KeepCalling, with no major-carrier parent. It offers prepaid, no-contract service built around a flexible build-your-own-plan model, where you choose minutes and data separately and get unlimited texts on every plan, alongside a few ready-made options. Tello is sold online only through tello.com, with mailed SIMs or eSIM activation.
Network & coverage
Tello runs on T-Mobile’s nationwide network, so coverage tracks T-Mobile’s footprint across the US. All plans include T-Mobile 5G at no extra cost on a compatible device, plus mobile hotspot. One catch worth knowing: as a value brand, Tello data can be deprioritized behind T-Mobile’s own postpaid customers during congestion, and the unlimited plan slows after a high-speed allowance.
How pricing works
Tello is prepaid with no contract and no early-termination fee, paid a month at a time, and you can change your plan any month with no penalty. Its build-your-own model lets you mix a voice bucket and a data amount, with low entry-level options for light users. Taxes and fees are not included; they’re added at checkout and shown before you pay. There’s no autopay discount and no price-lock guarantee.
Who it’s for
Tello suits light and moderate users who want to pay only for the minutes and data they actually need on T-Mobile coverage, especially anyone who values flexibility and free international calling. It is less suited to heavy streamers, who may hit the unlimited plan’s high-speed cap or face congestion slowdowns, or to anyone wanting taxes-included billing. The alternatives below are worth a look if all-in pricing is your priority.